But you are Borg resistance is futile sorry couldn't' resist :mrgreen:

Just so you know for the future, the hardi board or durarock boards are NOT waterproof, more like water resistant.

There is currently an inspection order on the building that states the drop ceiling tiles should be replaced so that there is a fire separation with a fire resistance rating of not less then 30 minutes.Is this achievable by just replacing the dropped ceiling tiles with newer higher rated tiles?

Anything else won't be resistant to UV and Ozone causing them to crack.

Sorry, I couldn’t resist.

I'd also replace W/ moisture/mold resistant drywall, rather than just use flashing and glue.

I see a few that seem to be popular at Home Depot & Lowes like Bathworks & Rust-Oleum but I have also seen reviews stating that people should avoid those brands.I have heard the concerns regarding slipping and I see that Bathworks now offers a slip resistant additive.Also, has anyone used these products on the tile surrounds or a backsplash as well as the actual tub?  

I can't resist the urge to ask a question so I just shout it out.

A well insulated building makes your heating and cooling loads less ... here it means you could use electric resistance baseboards with manageable loads.  

If wood is in good condition than a stain will resist peeling better than latex paints/enamels.